将Canvas图像作为Blob数据类型保存到mysql数据库中

Question

In My Project I got a canvas image and already sent to server, test.php, as shown below:

define('UPLOAD_DIR', '../uploads/');
$img = $_POST['canImg'];
$img = str_replace('data:image/png;base64,', '', $img);
$img = str_replace(' ', '+', $img);
$data = base64_decode($img);
$file = UPLOAD_DIR . uniqid() . '.png';
$success = file_put_contents($file, $data);
if($success)
echo "success";
else
echo "failed";

My Question is, how to save the file in to blob mysql field?

Answer 1

Establish MySQL connection, create the image table with the field img_data and other fields as needed , then something like this:

 if (!mysqli_query($con,
     "insert into images (img_id, img_data) values (".
     (int)$img_id.",'".mysqli_real_escape_string($con, $img_data)."')")) 
 {
   // handle error
 }